CN212217485U - Combined welding device for molybdenum nuclear fuel cladding tube - Google Patents
Combined welding device for molybdenum nuclear fuel cladding tube Download PDFInfo
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- CN212217485U CN212217485U CN202020507171.4U CN202020507171U CN212217485U CN 212217485 U CN212217485 U CN 212217485U CN 202020507171 U CN202020507171 U CN 202020507171U CN 212217485 U CN212217485 U CN 212217485U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model discloses a molybdenum nuclear fuel cladding pipe combination welding set relates to the welding set field, include: sealing the cabin; the rotary friction welding machine is arranged in the sealed cabin, and a workpiece to be welded is clamped on the rotary friction welding machine; the laser welding robot is arranged in the sealed cabin; a gas cylinder for storing an inert gas; the pressure regulating system comprises an air compressor, a vacuum pump, a pressure sensor and a first electromagnetic relay, wherein the pressure sensor is used for detecting the pressure in the sealed cabin, and the pressure sensor, the air compressor and the vacuum pump are all electrically connected with the first electromagnetic relay. The combined welding device for the molybdenum nuclear fuel cladding tube can be used for laser welding in a negative pressure environment and can also be used for rotary friction welding in a high pressure environment.
Description
Technical Field
The utility model relates to a welding set field especially relates to a molybdenum nuclear fuel cladding pipe combination welding set.
Background
Molybdenum has the advantages of small neutron absorption cross section, good high-temperature strength, good thermal conductivity, small linear expansion coefficient, good corrosion resistance and the like, so that molybdenum alloy is a main candidate material for an Accident fault-tolerant fuel (ATF) cladding in the world nuclear industry.
Although the high-performance molybdenum alloy has excellent strength and toughness, the high-performance molybdenum alloy needs to be assembled and welded when used for manufacturing ATF cladding, once the high-performance molybdenum alloy undergoes melting/solidification or recrystallization, the strength and toughness advantage disappears, and the heating area has serious problems of embrittlement and air hole defects. Meanwhile, the upper end plug needs to be sealed in a high-pressure (2-3MPa) environment to package high-pressure inert gas in the cladding tube, which leads to a more complex welding process, and the welding production quality and the welding production efficiency of the welding process face a great challenge.
The laser heat source deep fusion welding with high power density can weld under very low heat input to obtain a welding joint with a very small heating area size, can be used for welding molybdenum and molybdenum alloy under normal pressure or negative pressure, has great advantages particularly when laser welding is carried out under a negative pressure environment, can obviously improve the laser fusion depth, reduce the investment cost of laser equipment and reduce energy consumption. However, the high-pressure environment when the upper end plug blocks the hole can cause the metal material to be rapidly heated and melted and accompanied with the violent evaporation of the metal, the metal steam cloud cluster under the high-pressure environment is reduced in compressed volume and obviously increased in particle density, so that the penetration is greatly reduced and the reduction range is up to more than 80%, and meanwhile, the width of a melting zone is greatly increased, and the advantages of small, narrow and deep welding line size are completely lost. Therefore, a rotary friction welding method is needed when the upper end plug blocks the hole, the rotary friction welding has the advantages that the welding quality effect is not affected by the environmental pressure, the material is not melted, the temperature of a heating area is low, the problems of coarsening of molybdenum alloy grains, embrittlement of grain boundaries, serious pore defects and the like caused by high temperature can be inhibited, and the high-quality connecting joint is obtained. Therefore, the laser welding in the negative pressure environment and the rotary friction welding in the high pressure environment are sequentially carried out, and the method is an effective measure for guaranteeing the welding production quality of the molybdenum alloy ATF cladding. However, at present, no related welding device capable of performing laser welding in a negative pressure environment and performing rotary friction welding in a high pressure environment exists.
Therefore, it is an urgent need to solve the above-mentioned problems by those skilled in the art to provide a welding apparatus for a molybdenum nuclear fuel cladding tube assembly that can perform both laser welding in a negative pressure environment and rotational friction welding in a high pressure environment.
SUMMERY OF THE UTILITY MODEL
For solving above technical problem, the utility model provides a molybdenum nuclear fuel cladding pipe combination welding set, this molybdenum nuclear fuel cladding pipe combination welding set can carry out negative pressure environment laser welding, can carry out high pressure environment spin friction welding again.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides a molybdenum nuclear fuel cladding pipe combination welding set, include: sealing the cabin; the rotary friction welding machine is arranged in the sealed cabin, and a workpiece to be welded is clamped on the rotary friction welding machine; the laser welding robot is arranged in the sealed cabin; a gas cylinder for storing an inert gas; the pressure regulating system comprises an air compressor, a vacuum pump, a pressure sensor and a first electromagnetic relay, wherein the pressure sensor is used for detecting the pressure in the sealed cabin, and the pressure sensor, the air compressor and the vacuum pump are electrically connected with the first electromagnetic relay.
Preferably, the combined welding device for the molybdenum nuclear fuel cladding tube further comprises a gas regulating system, wherein the gas regulating system comprises a multi-gas detector and a second electromagnetic relay, the multi-gas detector is used for detecting gas components in the sealed cabin, and the multi-gas detector, the air compressor and the vacuum pump are all electrically connected with the second electromagnetic relay.
Preferably, the combined welding device for the molybdenum nuclear fuel cladding pipe further comprises a monitoring table, and the rotary friction welding machine, the laser welding robot, the pressure sensor and the multi-gas detector are all electrically connected with the monitoring table.
Preferably, the combined welding device for the molybdenum nuclear fuel cladding tube further comprises a camera, wherein the camera is electrically connected with the monitoring station, the camera is arranged in the sealed cabin, and the camera is arranged on the laser welding robot and moves synchronously with the laser of the laser welding robot.
Preferably, an observation window for observing the internal condition of the sealed cabin is formed in the sealed cabin.
Preferably, the sealed cabin is a stainless steel sealed cabin.
The utility model discloses for prior art gain following technological effect:
1. the utility model provides a molybdenum nuclear fuel cladding pipe combination welding set, through setting up rotatory friction welding machine, make the device can carry out rotatory friction welding, through setting up laser welding robot, make the device can carry out laser welding, adjust the pressure in the sealed cabin through setting up pressure governing system again, make the sealed cabin in can reach the high pressure and can reach the low pressure again, rotatory friction welding machine and laser welding robot all set up in the sealed cabin, and then this molybdenum nuclear fuel cladding pipe combination welding set can carry out negative pressure environment laser welding, can carry out high pressure environment rotatory friction welding again.
2. The utility model provides a molybdenum nuclear fuel cladding pipe combination welding set, the sealed cabin internal pressure is convenient adjustable, treats the welding workpiece centre gripping on the rotary friction welding machine, can accomplish multiple implementation to the different welding process of ambient pressure requirement in succession at same station after the clamping, and production efficiency improves greatly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a molybdenum nuclear fuel cladding tube combination welding device provided in an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic view of the pressure regulation mode in the sealed cabin of the combined welding device for the molybdenum nuclear fuel cladding tube provided in the embodiment of the present invention;
FIG. 4 is a schematic view of the gas conditioning mode in the sealed cabin of the combined welding device for the molybdenum nuclear fuel cladding tube provided in the embodiment of the present invention;
fig. 5 is a schematic view illustrating pressure changes in the sealed cabin during the welding process of the molybdenum nuclear fuel cladding tube combined welding device provided in the embodiment of the present invention.
Description of reference numerals:
1. sealing the cabin; 2. a rotary friction welding machine; 3. a laser welding robot; 4. a gas cylinder; 5. an air compressor; 6. an observation window; 7. a pressure sensor; 8. a monitoring station; 9. a camera; 10. a laser; 11. a molybdenum nuclear fuel cladding tube; 12. rotating the chuck; 13. a rod-shaped sealing block; 14. a hydraulic clamp; 15. a hollow upper end plug.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a can carry out negative pressure environment laser welding, can carry out high pressure environment spin friction welded molybdenum nuclear fuel cladding pipe combination welding set again.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 to 5, the present embodiment provides a molybdenum nuclear fuel cladding tube combination welding device, comprising: a sealed cabin 1; the rotary friction welding machine 2 is arranged in the sealed cabin 1, and a workpiece to be welded is clamped on the rotary friction welding machine 2; a laser welding robot 3 disposed in the sealed cabin 1; a gas cylinder 4 for storing inert gas; and the pressure regulating system comprises an air compressor 5, a vacuum pump, a pressure sensor 7 and a first electromagnetic relay, wherein the pressure sensor 7 is used for detecting the pressure in the sealed cabin 1, and the pressure sensor 7, the air compressor 5 and the vacuum pump are all electrically connected with the first electromagnetic relay.
This molybdenum nuclear fuel cladding pipe combination welding set is through setting up rotatory friction welding machine 2, make the device can carry out rotatory friction welding, through setting up laser welding robot 3, make the device can carry out laser welding, adjust the pressure in the sealed cabin 1 again through setting up pressure governing system, make in the sealed cabin 1 can reach the high pressure and can reach the low pressure again, rotatory friction welding machine 2 and laser welding robot 3 all set up in sealed cabin 1, and then this molybdenum nuclear fuel cladding pipe combination welding set can carry out negative pressure environment laser welding, can carry out high pressure environment rotatory friction welding again. In addition, the pressure in the sealed cabin 1 is convenient and adjustable, a workpiece to be welded is clamped on the rotary friction welding machine 2, and the implementation of various welding processes with different requirements on environmental pressure can be continuously completed on the same station after one-time clamping, so that the production efficiency is greatly improved.
In the specific use process, as shown in fig. 3, the air compressor 5 inputs/outputs gas into/from the sealed cabin 1 according to different welding stages to adjust the pressure in the sealed cabin 1, the pressure in the sealed cabin 1 is judged in real time through the pressure sensor 7 in the sealed cabin 1, the pressure sensor 7 is connected with the first electromagnetic relay, the first electromagnetic relay controls the vacuum pump and the air compressor 5, the air compressor 5 is connected with the air bottle 4, when the real-time pressure in the sealed cabin 1 exceeds/is not enough than a corresponding threshold value, the information is judged and obtained through the pressure sensor 7, and the pressure sensor 7 controls the vacuum pump and the air compressor 5 to be turned on/off through the first electromagnetic relay to discharge/supplement the pressure in the sealed cabin 1.
In this embodiment, in order to ensure the welding quality, the welding apparatus for the molybdenum nuclear fuel cladding tube combination further includes a gas regulating system, the gas regulating system includes a multi-gas detector and a second electromagnetic relay, the multi-gas detector is used for detecting gas components in the sealed cabin 1, and the multi-gas detector, the vacuum pump and the air compressor 5 are all electrically connected to the second electromagnetic relay.
In the specific use process, as shown in fig. 4, the multi-gas detector detects the components and contents of nitrogen, oxygen, carbon dioxide, carbon monoxide and the like, and is connected with the second electromagnetic relay, the second electromagnetic relay controls the vacuum pump and the air compressor 5, the air compressor 5 is connected with the gas cylinder 4, when the gas components exceed/fall below the corresponding threshold value in the sealed cabin 1, the multi-gas detector judges to obtain information through the multi-gas detector, and the multi-gas detector controls the vacuum pump and the air compressor 5 to be turned on/off through the second electromagnetic relay to discharge the gas in the sealed cabin 1 and supplement the inertia.
In this embodiment, in order to effectively monitor the welding process, as shown in fig. 1, the welding apparatus for the molybdenum nuclear fuel cladding tube combination further includes a monitoring console 8, and the rotary friction welding machine 2, the laser welding robot 3, the pressure sensor 7 and the multi-gas detector are electrically connected to the monitoring console 8.
Further, the combined welding device for the molybdenum nuclear fuel cladding pipe also comprises a camera 9, wherein the camera 9 is electrically connected with the monitoring station 8, the camera 9 is arranged in the sealed cabin 1, and the camera 9 is arranged on the laser welding robot 3 and moves synchronously with the laser 10 of the laser welding robot 3.
The monitoring station 8 monitors 4 types of information:
(1) the pressure in the sealed cabin 1 is fed back through a pressure sensor 7;
(2) the gas composition and content of the sealed cabin 1 are subjected to data feedback through a multi-gas detector;
(3) equipment parameters, instantaneous welding power of a laser 10 of the laser welding robot 3, and motor rotating speed and torque of the rotary friction welding machine 2;
(4) the welding picture taken by the camera 9.
In this embodiment, in order to effectively observe the welding process, the capsule 1 is provided with an observation window 6 for observing the internal condition of the capsule 1.
In this embodiment, the capsule 1 is a stainless steel capsule. So set up, sealed cabin 1 life prolongs greatly.
The specific process of welding the molybdenum nuclear fuel cladding tube 11 by the molybdenum nuclear fuel cladding tube combined welding device is as follows:
firstly, fixedly mounting a workpiece to be welded on a rotary chuck 12 of a rotary friction welding machine 2, repeatedly vacuumizing a sealed cabin 1 by a vacuum pump, then pumping inert gas in a gas cylinder 4 into the sealed cabin 1 by an air compressor 5, repeatedly executing the steps in such a way to ensure the purity of the gas in the sealed cabin 1, monitoring by a multi-gas detector that when the oxygen content of the gas in the sealed cabin 1 is less than or equal to 1.5PPM, the nitrogen content is less than or equal to 50PPM, the total carbon content is less than or equal to 5PPM and the water content is less than or equal to 3PPM, adjusting the pressure in the sealed cabin 1 to be between 0.01MPa and 0.1MPa, and forming a negative pressure cabin environment at the;
next, under the environment of a negative pressure inert gas atmosphere, a rotating chuck 12 of a rotary friction welding machine 2 clamps the upper end (close to the rotating chuck 12) of the molybdenum nuclear fuel cladding tube 11, a laser welding robot 3 moves to the lower end position (far from the rotating chuck 12) of the molybdenum nuclear fuel cladding tube 11, and the laser welding robot 3 is adopted to weld a circumferential weld between the solid lower end plug and the molybdenum nuclear fuel cladding tube 11 by a laser fusion brazing method;
after the solid lower end plug and the molybdenum nuclear fuel cladding tube 11 are welded, the rotating chuck 12 is opened, the heat insulation block, the nuclear fuel pellet and the spring are filled in the cladding tube 11, the hollow upper end plug 15 is assembled, then the hollow upper end plug 15 is clamped by the rotating chuck 12, the laser welding robot 3 moves to the upper end position (close to the end of the rotating chuck 12) of the cladding tube 11, and the laser welding robot 3 is adopted to weld a circular welding seam between the hollow upper end plug 15 and the molybdenum nuclear fuel cladding tube 11 by a laser fusion brazing method under the current negative-pressure inert gas atmosphere environment;
after the molybdenum nuclear fuel cladding tube 11 is welded with the solid lower end plug and the hollow upper end plug 15 in sequence, the laser welding robot 3 returns to the original position, the rotary chuck 12 of the rotary friction welding machine 2 clamps the molybdenum rod-shaped end plug, the hydraulic clamp 14 clamps the hollow upper end plug 15, the pressure in the cabin is adjusted to be between 2MPa and 3MPa through the air compressor 5, a high-pressure cabin body environment is formed at the moment, and the hollow upper end plug 15 and the molybdenum alloy rod-shaped sealing block 13 are welded by a non-upset rotary friction welding method at the same station in a high-pressure inert gas atmosphere environment;
after the rotary friction welding is finished, the pressure is adjusted to be in the normal pressure environment, the rotary chuck 12 and the hydraulic clamp 14 of the rotary friction welding machine 2 are opened, the molybdenum nuclear fuel cladding tube 11 after the welding is finished is taken out, and all the whole welding operations are finished.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (6)
1. A molybdenum nuclear fuel cladding tube gang welding apparatus, comprising:
sealing the cabin;
the rotary friction welding machine is arranged in the sealed cabin, and a workpiece to be welded is clamped on the rotary friction welding machine;
the laser welding robot is arranged in the sealed cabin;
a gas cylinder for storing an inert gas;
the pressure regulating system comprises an air compressor, a vacuum pump, a pressure sensor and a first electromagnetic relay, wherein the pressure sensor is used for detecting the pressure in the sealed cabin, and the pressure sensor, the air compressor and the vacuum pump are electrically connected with the first electromagnetic relay.
2. The molybdenum nuclear fuel cladding tube combination welding device of claim 1, further comprising a gas conditioning system, the gas conditioning system comprising a multi-gas detector and a second electromagnetic relay, the multi-gas detector being configured to detect a gas composition within the capsule, the multi-gas detector, the air compressor, and the vacuum pump all being electrically connected to the second electromagnetic relay.
3. The molybdenum nuclear fuel cladding tube combination welding device of claim 2, further comprising a monitoring station, wherein the rotary friction welder, the laser welding robot, the pressure sensor and the multi-gas detector are all electrically connected with the monitoring station.
4. A molybdenum nuclear fuel cladding tube combination welding device as defined in claim 3, further comprising a camera electrically connected with the monitoring station, the camera being disposed in the sealed cabin, and the camera being disposed on the laser welding robot and moving synchronously with the laser of the laser welding robot.
5. The molybdenum nuclear fuel cladding tube combination welding device as claimed in claim 1, wherein an observation window for observing the inside condition of the sealed cabin is opened on the sealed cabin.
6. The molybdenum nuclear fuel cladding tube combination welding device of claim 1, wherein the capsule is a stainless steel capsule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020507171.4U CN212217485U (en) | 2020-04-09 | 2020-04-09 | Combined welding device for molybdenum nuclear fuel cladding tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020507171.4U CN212217485U (en) | 2020-04-09 | 2020-04-09 | Combined welding device for molybdenum nuclear fuel cladding tube |
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| Publication Number | Publication Date |
|---|---|
| CN212217485U true CN212217485U (en) | 2020-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020507171.4U Active CN212217485U (en) | 2020-04-09 | 2020-04-09 | Combined welding device for molybdenum nuclear fuel cladding tube |
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| Country | Link |
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| CN (1) | CN212217485U (en) |
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2020
- 2020-04-09 CN CN202020507171.4U patent/CN212217485U/en active Active
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